No major expansion DLC (new islands, spirits, or story chapters) has been officially released for Moonstone Island on Switch as of the latest update.
If you need help finding the official eShop page for Moonstone Island or understanding how to update your legit copy, let me know Moonstone Island Switch NSP -DLC Update- -eShop-
If you own a legitimate copy and have a modded Switch (running Atmosphere or similar CFW), you can legally dump your own NSP. Here is the safe workflow: No major expansion DLC (new islands, spirits, or
Never upload these files online. Sharing your dump is where the legality ends. If you need help finding the official eShop
Even if a cracked NSP works today, you cannot apply official eShop updates to it later. You will be stuck on version 1.0.0 while legit players enjoy new content.